ML20211E922
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.i UNITED STATES
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g NUCLEAR REGULATORY COMMISSION.
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WASHINGTON, D. C. 20555 N [;'[,, /
sut. J 0 1902 Docket Nos.:
50-275 and 50-323
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MEtiORANDUM FOR:
H. Denton, NRR-E. Case, NRR
- 0. Eisenhut, DL R. Purple, OL T. Novak, DL G. Lainas, DL H. Thompson, DHFS R. Mattson, OSI R. Vollmer, DE S. Hanauer, OST J. Sniezek, IE THRU:
. J. Miraglia, Chief, Licensing Branch No. 3, OL FROM:
H. S. Schierling, Project Manager, Licensing Branch No. 3, OL
SUBJECT:
OAILY HIGHLIGHT DIABLO CANYON Attached is a copy of an article in the San Francisco Chronicle on Friday July 30,1982.
According to the article PG&E will reverify essentially the entire seismic design of the plant. A meeting has been scheduled tentatively for Friday August 6,1982, in Bethesda for PG&E to describe to the staff the details of effort.
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Oa H. E. Schierling, Project Manager Licensing Branch No. 3 Division of Licensing
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m 6 SanJr:artwo O rnids fr Fri..kiy 30,1082 1r.
t PG&E May StadOM gain at DioMcL D Wd" P*tif
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l "Centiderta:; :verythb; thzt nee,b Until tue meeting takes place. NRC to be donc."llo(h asid,"and cenaldering consultants.
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- ,, officials have no Problems in the design of the PO4'E s plen, but,fortnal reaction to the independent programs and the!It Of seven problern arc
- 3 Idantitled, Diablo Cenyan nurtour plant dis--
depend!ng en how need to take samples, at har become reost had been resolved at the meettag, covered by independent reviewers
'omprehensive it is, it v.otid,ctrtainly apparent to us that a quicker war.
Hoch said, but one critical discsepitocy could force Pacific Gas and Elec, bt a ste;i in the right d;rsuiun, said through this is.. en sey. !*t's redo the,
. In stresses on supporta of the two pipe I
tric Co. to recalculate sirtually FranU.!!:sgua, an engineer in me Es, entire popuistion'of piset problems!"
aystems remalned.
I r.uclear reactor regulation branch-the cettre selsmic snfety,ges,. ;n og If the NRC approves the p!sn, he
'llte Pipes, a Warh pb es:rying.
t'ie plant.
It sould Indicate to people that ssM, the work wm be d:ns jo:stly bt cooling water dur!ng narraal operation they have really looked, and give added PCLE r.ad naclaar powei emporta frot3 of the plaat and a smaller pipe that no expected dectston marb a ma-0t out assarsace that whatever wasn't rig 51 bis the Bechtel Group, which has been hireis would carry coolant saad t case of at be :ncrease 8n PGLEs effe't to ::nyr":.1 design discrrpsacics 1:.4 tr f,
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plant's problems times the acceleration espectad by rans uncevesed la the 523 IdTdun plant during the past 10 montns.
, us suspended last year after discovery Ing Tuesday between a toman PG<
. Given Ibc m:gnitude of the sup-A license to start low-po?.cr testing Hoch's disclosure followed a meet-
- % are going to bita the outlet and say anis way we are going to pat our that en engineering drawing uwd to tears and a structural analych lircup al port force lascases, a re+ valuation of Itcense bsch 8 tr'show everpody we are estimate earthquake strwa had been the Brookh:ven Nationa! Laboratory'.
' All fptpa system support designs poema,
doin2 : co:rplete, rnponsibic job, and wrongly app!!ed in Unit One, one of the The analysta group undertook tot the warranted." the report said.
not to say, *1:cy, t!.cra aren't any prob.
plant's twin 1100megawait coactors.
NitC an exbsustively detaned check o.'
s team was,'not happy,, t iems,* ** said PGLE Diablu project manag.
the earthquake response of a four-story' At the request of the NRC,indepen-lugh netanrk of g:rders and acecas walk, to see this conchnien H 'he report. ]!e g' g' dent setentatic teams have spent most of nys ari>und the latcrior of the pleut's>
>Hd he 5 eMec e new anahaia by
-(t is golag to be painful.
this year checking the plant's safety Mve endomiih* containment l PG.tE, which will be submitted to Telo
- dyne, will esse or end the discrepancy.
system and earthquake resistance. The de,m.
a
- ~ e bb amounts to 'reverifying esl.
liut, he conceded, aJme of the dieertp.
n i entially the entire seismic destin of the tions of the actual installect p! pes that.
plant." 11xh said.The varir 4 aimed at were origtmity ust'd by PC&E in assem-8, j v rf bling methematical snodtris of tuelt re.
s.surtnt: C;t the plaat iccard not :ustain
'[4 h n.mm tc tn 4mvem,.3 agnifusr.t darrage trora an earthquake
- s. L, 4.4111v La.1100 LU 1 L Y Cl.1.
LAJf
- , pense i., e s shquane6 were wrong. We of 7.5 maganude on the ilosgra tsuit just dul h wrong?
the entire seismic design >
m,, s. e,ev.s,ae s.und,.s.
Altnoulfa uttlity en: Inters think it of Diablo Canyor' *The s'"'W d'.nt he my npsed eventuel lleensto: of the,.
ul:1. % tilat *f ter e'l thera :nsly.ch aie
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- . t 'or full oper t!ct, the der!sicit h 'en a hW M M " annulus f dune, the actualchanges to the physital
- w. Jd tocan rakt an lattilm license t Independent r:viear effo:t, headed hy structute' that was invoived in the engl-t plant will be very shght. We attll haven't load iuci, whien t'GLE had hoped to get T;;cdyuc Enginecitug Services of blasse-neering minup discovered last fall. It is !
lound a single case of texnectedi f allur=
ty tne end cf iirrt month."te more intely cauwnis, has uncovered m8merous dls. crisserossed with pinc: carrying cooltag {
in the case of an cattlMuske en the t
att imit! 1*** end of the yaar," Heft Howl fauh?
crepanctes between its ca!cubtinna of wate r vi'st to safe 91*ftstion of the p!2nt. g
, carthquake fcrees and tt'rva caed by. The I!rcel.bzven grcuf. ccr. eluded II.ai i
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The fin t decbion hee not yet heen PP. en't its cearn'!:n'31 en;!:ccring, in some p:4ces u mishi caperience vertF l rnsd:, cid !!:'.h. recched by ::hptcac de pt:nt.
tal shaking tar fupber than estimated by l ll PQM and its orleir:*f desl:n ccr.M-
- N= ar T.cpht;ry Connah;isa hesd-
- Ona recent PGE report Itated t'7T yuaries La Wasaugion.
seomreto erNems in Stdplert's Acy,9, twis, t.1Phr hn E cme At:c:icc e
the 6.! *nen Mentined 4 T:!: dyne,,x:'! use pear'ut computing t:cha!I;uE : hat
/. mcmag in W.: g squral Ly The Brookbaven teen we- ^1 to
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FME won stia icthat. al stall of the.
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'oetm nu ruce [my Tenlyne.and 41 are"d ' pv.de!rtru:t:::: =rthq=ka rraf.oo34 in
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AC tur inte next ween to casevs pukerr. new assevment cf wnnt must tw
"'ne correcten oy N4t;.
, 2 r.ce d h.g gw - m e u n.m u.c :<, e sv.re ih. =ane thst the plar.1 p..g r
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